Hopefully a final issue to resolve before I’m up and running, the automated script seems to have completed all tasks successfully, but when I run npm start the start script fails, and I see this in the debug logs:

Are you running it through an SSH connection? If so, try running DISPLAY=:0 nohup npm start &
If that works, I recommend using pm2 to automatically start your mirror. You can find the guide to get pm2 to work with here.